Test "Scalable Vector Extension (SVE) support." on arm64

Change-Id: I3abaca932985a06b06887b962e769f2eac96c738

test/sve/src/018.c

@@ -0,0 +1,53 @@
+/* 018.c COPYRIGHT FUJITSU LIMITED 2017-2019 */
+/* prctl(PR_SVE_SET_VL, PR_SVE_SET_VL_THREAD) on multi thread. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <signal.h>
+#include <errno.h>
+#include "common.h"
+
+static int sync;
+static void *child_function(void *arg)
+{
+	while (!sync) {
+		cpu_pause();
+	}
+	return NULL;
+}
+
+TEST_FUNC(TEST_NUMBER, vl, unused1, unused2, unused3)
+{
+	int ret = -1;
+	pthread_t thread;
+
+	print_test_overview(tp_num);
+
+	if (pthread_create(&thread, NULL, child_function, NULL)) {
+		printf("pthread_create: error.\n");
+		goto out;
+	}
+
+	ret = set_and_compare_vl(vl);
+	if (ret != EINVAL) {
+		printf("SVE_SET_VL is not EINVAL error.\n");
+		goto join_out;
+	}
+
+	/* success */
+	ret = 0;
+
+join_out:
+	sync = 1;
+	if (pthread_join(thread, NULL)) {
+		printf("pthread_join: error.\n");
+		ret = -1;
+	}
+out:
+	if (ret == 0) {
+		printf("RESULT: OK.\n");
+	} else {
+		printf("RESULT: NG.\n");
+	}
+	return ret;
+}